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Diffstat (limited to 'runtime/arm/i64_utod.S')
-rw-r--r-- | runtime/arm/i64_utod.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/runtime/arm/i64_utod.S b/runtime/arm/i64_utod.S new file mode 100644 index 00000000..e98e46cd --- /dev/null +++ b/runtime/arm/i64_utod.S @@ -0,0 +1,56 @@ +@ ***************************************************************** +@ +@ The Compcert verified compiler +@ +@ Xavier Leroy, INRIA Paris-Rocquencourt +@ +@ Copyright (c) 2013 Institut National de Recherche en Informatique et +@ en Automatique. +@ +@ Redistribution and use in source and binary forms, with or without +@ modification, are permitted provided that the following conditions are met: +@ * Redistributions of source code must retain the above copyright +@ notice, this list of conditions and the following disclaimer. +@ * Redistributions in binary form must reproduce the above copyright +@ notice, this list of conditions and the following disclaimer in the +@ documentation and/or other materials provided with the distribution. +@ * Neither the name of the <organization> nor the +@ names of its contributors may be used to endorse or promote products +@ derived from this software without specific prior written permission. +@ +@ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +@ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +@ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +@ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT +@ HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +@ EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +@ PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +@ PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +@ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +@ NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +@ +@ ********************************************************************* + +@ Helper functions for 64-bit integer arithmetic. ARM version. + + .text + +@@@ Conversion from unsigned 64-bit integer to double float + + .global __i64_utod +__i64_utod: + fmsr s0, r0 + fuitod d0, s0 @ convert low half to double (unsigned) + fmsr s2, r1 + fuitod d1, s2 @ convert high half to double (unsigned) + fldd d2, .LC1 @ d2 = 2^32 + fmacd d0, d1, d2 @ d0 = d0 + d1 * d2 = double value of int64 + fmrrd r0, r1, d0 @ return result in r0, r1 + bx lr + .type __i64_utod, %function + .size __i64_utod, . - __i64_utod + + .balign 8 +.LC1: .quad 0x41f0000000000000 @ 2^32 in double precision + |